The equation of the bisectors of the angle between the lines given by $3x^2+5xy+4y^2=0$ is

If the real pair of lines $L_1 : ax^2 + 2hxy + by^2 = 0$ represents the angle bisectors of the real lines given by $L_2 : Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0$,then which of the following is incorrect?

If $\alpha$ represents the square of the distance between the origin and the point of intersection of the lines $x^2-y^2-x+3y-2=0$ and $\beta$ represents the product of the perpendicular distances from the origin to the pair of lines,then $\alpha \beta=$

If the pair of straight lines $xy-x-y+1=0$ and the line $ax+2y-3a=0$ are concurrent,then $a$ is equal to

If the lines $x^2+2xy-35y^2-4x+44y-12=0$ and $5x+\lambda y-8=0$ are concurrent,then the value of $\lambda$ is

The locus of the points equidistant from the lines represented by $x^2 \cos^2 \theta - xy \sin^2 \theta - y^2 \sin^2 \theta = 0$ is